Union-coupling.



Patented Aug. l5, I899.

A. E. DART.

UNION COUPLING.

(Application filed Apr. 17, 1899.)

ill/4 431 4 7 4/42 {No Model.)

' NVENTUR @QZZerZEDarZ QZM wAsmnc-Tm o c Nl-TED STATES ALBERT E. DART, OF BRIDGETON, RHODE ISLAND, ASSIGNOR TO THE A. E DART UNION COMPANY, OF VOBURN, MASSACHUSETTS.

UNlON-COU-PLlNG.

SPECIFICATION forming part Of Letters Patent No. 631,064, dated August 15, 1899.

Application filed April 17, 1899. Serial No. 713AO7. (N model.)

To all whom it may concern.- ingly curved or concave interior surface of Be it known that I, ALBERT E. DART, a citithe inwardly-projecting flange g of the coupzen of the United States, residing at Bridgeling-nut O, which thus holds the two memton, in the county of Providence and State of bers A B together in such manner as to per- 5 Rhode Island, have invented certain new and mit of a movement of the one upon the other useful Imprbvements in Union-Couplings, of in the arc of a circle if thrown or moved out which the following is a specification. of alinement by accident or design.

My invention has for its object to provide Between the opposing convex and concave a union-coupling for pipes of various kinds in faces of the members A Bis placed a con cavo- 10 which the packing-ring will be held more seconvex packing-ring h, which is preferably curely than heretofore and may be easily refitted within a shallow recess 2', formed in one. moved and replaced by another of the same of the members, as shown in Fig. 2, whereby or different substance. it is held firmly in position without liability A further object of the invention is to enof displacement under any movement in the I 5 able the two members of the coupling to be are of a circle of the opposing convex and conmoved out of alinement without disturbing cave faces of the two members, perfect sethe packing or causing leakage at the joint. on rity being thus aflorded against leakage in To this end my invention consists in a coupcase the pipes connected by said coupling ling comprising two opposing members, one should be thrown out of alinement or it 20 having a convex and the other a concave face should be found necessary to connect them held together by anut or by means of flanges when not in a perfectly straight line. and bolts and a concavo-convex packing in- The packingbetween the two members may, terposed between said members, whereby a ifdesired,consistoftwo concavo-convexpackperfectly tight joint is secured, the members ing-rings placed together each packing-ring 25 of which can be moved out of alinement withbeing fitted into a recess in the face of the out producing leakage, as hereinafter more member against which it rests and said packfully set forth. ing-rings being adapted to slide one upon the In the accompanying drawings, Figure 1 is other when the two members of the coupling a side elevation of my improved union-coupare moved out of alinement. This duplex 3o ling. Fig. 2 is alongitudinal vertical section packing is well adapted for use when the of the same. Fig. 3 is a side elevation illuscoupled pipes are employed to convey amtrating a modified form of my coupling. Fig. monia or acids, in which case the packingeL is a longitudinal vertical section of the rings would be formed of lead or other suitsame. ble substance free from liability to become 3 5 In Figs. 1 and 2 of the said drawings, A repcorroded by the liquid passing through the resents the male member of the coupling, pipes. which is provided with a convex face a, and Figs. 3 and 4 illustrate a modification of my 13 represents the female member, having a invention which may be preferred in some concave face I), which forms a seat for the cases, as it admits of a greater range of move- 4o packing, to be hereinafter described, said ment in the are of a circle of one member members being interiorly threaded to receive upon the other. In this example the opposthe corresponding threaded ends of the pipe ing faces of the two members of the coupling 0 d, which are connected by means of the are provided,respectively,asbefore,withconconpling. vex and concave faces; but instead of being O is the coupling-nut, which is interiorly held togetherbya coupling-nut, as previously threaded, as usual, at e, the female member described, they are connected by means of B being correspondingly threaded to engage flanges k m, spaced apart, and bolts n, the the threaded portion of the nut, while the flange It being formed integral with the female member is provided with aflange f, havmale member 13, while the flange m consists x00 50 ing an outer convex or beveled bearing-surof an independent annulus or ring loosely face 10, against which rests the correspondslipped over the outer end of the male memberA and taking a bearing against its flange or shoulder f, the surface of which is convex and forms a seat for the correspondingly concaved or beveled inner periphery of the ring-shaped flange m. The packing-ring does not extend between the flanges is m, which are spaced apart when held by the bolts 12, I

and consequently the packing does not in any manner interfere with the free movement in the arc of a circle of one member upon the other when moved out of alinement, which movement can be effected without producing any leakage whatever, which would surely occur under like circumstances with the ordinaryflange-couplingin common use. Heretofore in connecting two pipes with a flangecoupling if the flanges did not happen to abut squarely against each other it has frequently been customary to turn off one or both faces at an angle to insure the proper fit; but with my improved construction this is'entirely unnecessary, as a perfect joint can be effected without leakage owing to the capability of moving one member of the coupling upon the other in the arc of a circle in the manner described.

hat I claim as my invention, and desire to secure by Letters Patent, is-

1. A union-coupling for pipes, comprising two opposing members, one having a convex, and the other a concave face, means for coupling said members together, whereby they are permitted to move independently of each other in the arc of a circle, and a readily-removable concavo-convex packing-ring interposed between said two members, substantially as described.

2. A union-coupling for pipes comprising two opposing members, one having a convex, and the other a concave face, means for coupling said members together, whereby they are permitted to move independently of each other in the arc of a circle, and a concavoconvex packing-ring interposed between said two members, and fitted readily removable within a recess in the face of one of said members and held from lateral displacement thereby, substantially as described.

3. In a pipe-coupling, the combination of two opposing members, one havingaconvex, and the other a concave face, and one of said members having a flange or shoulder forming an outer convex bearing-surface, a readilyremovable concavo-convex packing-ring interposed between the opposing faces of the two members, means for preventing lateral displacement of the packing-ring and a coup ling device for holding said members together in such manner as to permit them to move independently of each other in the arc of a circle, said coupling device having a bearingsurface fitting over the convex bearing-surface of the flange or shoulder of one of said members, substantially as described.

at. In a pipe-coupling, the combination of two opposing members, one having a convex, and the other a concave face, and one of said members having a flange formed integral therewith, and the other member being provided with a shoulder having an outer convex or beveledbearing-surface, and a detachable. flange or ring-fitting over and movable upon said convex bearing-surface, said flanges being spaced apart, a concave-convex pack ing-ring interposed between said members, and bolts passing through the stationary and movable flanges for holding the two members of the coupling together, substantially as described.

YVitness my hand this 10th A. D. 1899.

day of April,

ALBERT E. DART.

In presence of-- P. E. TESCHEMACHER, M. B. WILsoN. 

